Valve-ghtlirding tool



C. M. BRUCE.

VALVE GRINDING TOOL.

APPLICATION FILED JUNE 30.1917. RENEWED APR. 10, I919.

1,310,278. Patented July 15, 1919.

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C. M. BRUCE.

VALVE GRNDING TOOL.

APPLICATION FILED JUNE 30.1911. RENEWED APR. l0. I919.

Patented July 15, 1919.

2 SHEETS-SHEET 2- TH! CDLUMIIA PLA NDUIIAPH Co WASHINGTON. D. c.

UNTTED STATES PATENT OFFICE.

CYRUS M. BRUCE, 0F EWING, KENTUCKY.

VALVE-GRINDING TOOL.

Application filed June 30, 1917, Serial No. 177,947.

To all whom it may concern:

Be it known that I, Crnos M. Bnocn, a citizen of the United States, and a resident of Ewing, in the county of Fleming and State of Kentucky, have invented a certain new and useful Improvement in Valve- Grinding Tools, of which the following is a specification.

The present invention relates to valve grinding tools, and more particularly to that type adapted to reseat the valves of internal combustion engines and the like.

An object of the present invention is to provide a valve grinding tool capable of grinding a number of valves simultaneously, and which is of such construction that the instrument may be secured to the head or upper end of a cylinder for engagement with the tool to operate the same simultaneously.

Another object of the present invention is to provide a valve grinding machine which is portable; which comprises relatively few parts; which is light in weight and which may be manually lifted into and out of position; and a machine which is adapted to grind a plurality of valves in a relatively short time.

The above, and various other objects and advantages of this invention will be in part described, and in part understood. from the following detailed description of the present preferred embodiment, the same being illustrated in the accompanying drawings, Wherein:.

Figure 1 is a side elevation of a valve grinding machine constructed according to the present invention.

Fig. 2 is a top plan view of the same.

Fi 3 is a horizontal section taken substantially on the line 33 of Fig. 1.

Fig. 4 is a fragmentary enlarged sectional view through one of the adjustable bearings for one of the reciprocating elements.

Fig. 5 is a fragmentary sectional view, enlarged. through the rotating disk and the detachable wrist pin mounted therein.

Referring to the drawings, 10 designates a frame which is preferably of rectangular construction, and which extends vertically. The frame 10 is reinforced by the provision of a pair at vertically spaced apart webs or Patented July 15, 1919.

Renewed April 10, 1919. Serial No. 289,133.

braces 11 and 12 which extend longitudinally in the frame 10, and which provide supports for the reciprocating valve engaging elements.

The braces 11 and 12 are provided, in vertical register, with pairs of longitudinally extending slots 13 through which project the opposite ends of tool sockets 14 provided with angular openings in their lower ends into which are engaged the angularly formed shanks of valve engaging tools 15. The base of the frame 10 is provided with a longitudinally extending slot 16 through which the tools 15 project, the tools extending downwardly through the frame 10 and into the valve chambers of an internal combustion engine A. or the like. The valve tools 15 may be of any suitable form and are preferably provided with spade ends for engagement in the kerfs usually formed in the valve head B.

The socket members 14 are adapted for adjustment toward and from each other in the slots 13. and are retained in adjusted position by slidable bearing plates 17 which rest upon the upper faces of the braces 11 and 12. and which are provided at one end with openings therethrough adapted to snugly and rotatably receive the sockets 14 therethrough. The opposite ends of the bearing plates 17 have formed therein longitudinally extending slots 18 through which engage set screws 19, the latter havin threaded engagement. with the braces 11 an 12. The set screws 19 bind the plates 18 in adjusted position and hold the sockets 14 from movement in the slots 13. As shown in Fig. 1, four bearing plates 17 are employed. the bearing plates engaging the up per and lower ends of the sockets 14. and being carried upon the braces 11 and 12 respectively. The sockets 14 are vertically movable through the bearing plates 17, and are normally urged upward by the provision of yieldable springs 20 which surround the sockets 14 immediately above the lower bearing plates 17. The upper ends of the springs 20 bear against the lower faces of toothed sectors 21 which are arranged upon the sockets 14- between the braces .11 and 12 and which are adjustably secured into position by set screws 22 which engage inwardly from the Hat sides of the sectors 21 and bind against the respective sockets 14. The springs 20 hearing against tho 'seetors 21 urge the same and the sockets 14 upwardly through the bearing plates 17.

The upper ends of the sockets'M terminate short of the upper portion of the frame 10, and a pressure bar 23 engages across the upper ends of the sockets l4 and extends beyond the latter. The pressure plate 23 is provided at opposite ends with depending stems 24 sl idably'en gaging through apertures suitably formed in the upper brace bar 11. Springs 25 are carried about the stem 24 between the brare bar 11 and the pressure bar 23 to urge the latter upwardly out of engagement with the sockets 14. The upper part of the frame 12 is provided with a pair of set screws 26 which are threaded downwardly through the frame, and which enage at their lower ends against the pressure ar 23. Upon turning the set serous 2G (.lownwardly through the frame 10, the latter urge the pressure bar 23 downwardly against the springs 25, and against the ten sion of the springs 20 to urge the sockets 1.4 downwardly through the brace bars 11 and 12, and advance the tools 15 against the valve heads 13. The desired pressure of the tools 15 against the valve heads B may thus be obtained, and clamps 27 may be em ployed at the/opposite ends of the frame 10 for engagement with the body of the engine A to hold the frame thereto. In the present instance, each clamp 27 is in'the form of a head adapted to engage, in an opening of the body A and beneath inwardly extending flanges formed thereon. The head of the clamp 27 is provided with an upstanding pin which passes through the lower end of the frame 10, and which is suitably threaded for the reception of a binding nut 28 upon its upper 'end. The binding nut 28 engages against the inner face of the frame 10 and holds the latter firmly to the body A of the engine.

A rack bar 29 is arranged in the frame 10 between the braeesdl and 12, and has itsopposite ends slidably engaging through the end portions of the frame 10. The rack bar 29 has the teeth thereof'faeing the teeth of thesectors 21 and'is-adapted to intermesh with the same. Links,30 are pivoted upon pins 31 intermediate the ends of the links, andwhich are arrangedin the nap portion of theframe near the opposite on 3 thereof. The lower ends of the links'30 are longitudinally slotted and are adapted" to extend through openings'32 formed *verti cally'in the raok'balr 29 adjacent the opposite ends thereof. Pins 33 are secured trans versel'y through th-e'opposite ends of the rack bar29 and'th'roughthetslot's in the links 30 to'eouplethelinks theraok' 'bar.

Connecting bars 34 are pivotally connected at one end to the upper ends of the links 30, the connecting bars 3t extending inwardly toward each other and being pivotally mounted at their free ends in overlapping relati'on upon a wrist pin 35 which projects outwardly from a disk 36. As shown to advantage in Fig. 5, the disk 36 is provided with an opening thorethrough adapted to receive the shank of the wrist pin 35, and having a countersink adapted to receive the head of the pin. The disk 36 is provided with a plurality of openings 37 adapted to reteive the wrist pin 35 therein, and the openings being arranged at different radial distances from the central axis of ro tation of the disk 36. A cross pin 38 or the like is secured through the outer-end of the wrist pin 35 to detachably retain the con necting bars 34 thereon.

The disk 36 is secured to one end of a drive shaft 39, the latter being mounted in a bearing 4:0'upstanding from the framelO, and having upon its opposite end a preferably peripherally grooved pulley or operating wheel ll over which is trained a belt -42 actuated by a motor 43", or the like.

In theuse of this valve grinding machine, the frame 10 is seated on the :upper end of the cylinder A Withthe valve engaging-tools 15 projecting into the valve casingsof the' cylinder, in the present instance, a beveled cylinder is shown, and the two valve tools 15 may. be simultaneously engaged and operated to grind both valves of the beveled cylinder. The clamps 27 are now adjusted to hold the frame-10 upon the cylinder, and I the motor 43 is set' in operation. The motor 43 turns theshaft 39, and the latter rotates the disk 36, and through the medium of the connectingbars 34, rocks the links 30 and" reeiproeates the=rack bar 29.

As the rack bar 29 is reeiprocatedthe'sectors 21 are rocked together 'with' the'sockets l 1 1 of the valve engagin elements, simultaneously reci roeating t e same, and also reciprocating t e valve heads B with which i the valve engaging elements engage.

The desired tension maybe-placed; upon a the valve engaging elements by adjusting the set screws 26 to move thepressure bars 23 downwardly and thus advance the tools" 15 against the valve heads. The bearing) plates 17 maybe adjusted longitudinally? upon the braoesll and 12 *to" move the valve engaging elements toward and from each other and thusoenter the tools 15-in the valve easing.

. It is of course'understood that any number of valve engaging elements "may be mounted in the casirrglWand connected to the raekbar 29-'in the manner shown, and i that A various other changes and modifica time may be made in the details of construction, and design, of the above specifically described embodiment of this invention without departing from the spirit thereof, and being restricted only by the scope of the following claims. v

Iclaim: .1 w .1 l

1. In a valve grindin machine, the combination of a frame, a p uralit of valve engaging elements mounted in tlie frame, operating means connected to the valve engaging elements, means for normally urging the valve engaging elements upwardly in the frame, a pressure bar mounted in the top of the frame for engagement with the upper ends of the valve engaging elements, means for urging the pressure bar upwardly in the frame, and ad usting means in the top of the frame for engagement with the pressure bar to urge the latter downwardly against said valve engaging elements and to advance the latter downwardly in the frame.

2. In a valve grinding machine, the combination of a frame, a pair of vertically spaced-apart braces extending longitudinally in the frame, said braces having vertically registering longitudinal slotstherethrough, valve engaging elements mounted in said slots and adapted for movement toward and from each other, bearings mounted on said braces and adapted for adjustment toward and from each other and to support said valve engaging elements, a rack bar mounted for longitudinal reciprocation in the frame, sectors carried upon said valve engaging elements, and intermeshing with the teeth of said rack bar, a pair of links pivotally mounted in the upper end of the frame and having pin and slot connections with said rack bar, an operating shaft, means for turning the shaft, a disk mounted on the shaft, and an adjustable wrist pin carried on the disk and having connection with said links for rocking the same upon the turning of said shaft.

3. In a valve grinding machine, a frame, a plurality of vertically adjustable socket members carried by said frame, means for normally urging said socket members upwardly, a pressure bar engaging the upper ends of said socket members, and adjustable means for forcing said pressure bar downwardly.

4. In a valve grinding machine, a frame, a plurality of vertically adjustable socket members carried by said frame, means for normally urging said socket members upwardly, a pressure bar engaging the upper ends of said socket members, and adjustable means carried by said frame and on aging said pressure bar near its ends for orcing the bar downwardly whereby one end of the bar may be moved a greater distance than the opposite end.

5. In a valve grinding machine, a. frame,

a plurality of vertically adjustable socket members carried by said frame, means for normally urging said socket members upwardly, a pressure bar engaging the upper ends of said socket members, guide pins carried bysaid pressure bar near its ends, springs "coiled about said guide pins for normally urging the pressure bar upwardly, and adjustable means carried by said frame and engaging said pressure bar near its ends for forcin the bar downwardly, whereby one end 0 the bar may be moved a greater distance than the opposite end.

6. In a valve grinding machine, a frame, a plurality of vertically adjustable socket members carried by the frame, means for normally urging said socket members upwardly a pressure bar engaging the upper ends of said socket members, a pair of set screws adjustably carried by said frame and enfgaging said ressure bar near its ends for orcing the ar downwardly upon adjustment thereof.

7. In a valve grinding machine, a frame, a plurality of vertically adjustable socket members carried by the frame, means for normally urging said socket members upwardly, a ressure bar engaging the upper ends of said socket members, a pair of set screws adjustably carried by said frame and enga 'ng said pressure bar near its ends for orcinfi the bar downwardly upon adjustment t ereof, guide pins carried by said pressure bar near its ends, and springs coiled about said guide pins for normally urging the pressure bar upwardly.

8. In a valve grmding machine, the combination of a frame, a pair of valve engaging elements mounted in the frame, bearings longitudinally adjustable in the frame for said valve engaging elements, sectors carried by said valve engaging elements, a rack bar reciprocable longitudinally in the frame and intermeshing with said sectors, operating means connected to said rack bar for reciprocating the same to actuate the valve engaging elements, means for normally urging said valve engaging elements upwardly, a pressure bar engaging the upper ends of said valve engaging elements, and adjustable means for forcing said pressure bar downwardly.

9. In a valve grinding machine, a frame, a plurality of vertically adjustable socket members carried by said frame, longitudinally adjustable bearings mounted in the frame for said socket members, a pressure bar engaging the upper ends of said socket members, means for normally urging said socket members u wardly, means for normally urging said pressure bar upwardly, and adjustable means for forcing said pressure bar downwardly.

10. In a valve grinding machine, a frame,

a plurality of vertically adjustable socket members carried by said frame, means for normally urging said socket members up wardly, a pressure bar engaging the upper ends of said socket members, adjustable means for forcing said pressure bar downwardly, means for rotating said socket members including sectors carried by said socket members, a raekbar meshing with said sectors, pivotally supported links having slot 10 and pin connection with said 1 rack bar, a disk, an adjustable wrist pin carried'by said disk and having connection w ith the link to move the rack bar upon rotation of the disk, and means for rotating the disk.

CYRUSM BRUCE.

copies of this patent may be obtained to: Me cents each, by addressing the Commissioner 012mm, Washington, D; O." 

